Depends. I've seen a number of people who made the assumption that if someone was polyamorous, kinky, pagan, what have you, that because they were any part of those subcultures, or simply assumed that they were part of those subcultures based on the fact that they were at a convention, that violating a person's personal space was ok.

Whether or not it was meant in good faith, a violation still occured. I once had a woman I didn't know smack me with her newly purchased flogger because she heard me talking with a friend about a kinky subject while we were standing in the booth. Sure, she probably meant it to be playful, maybe flirtatious, and was not in fact asserting herself as my dominant in that situation, but that does not change the fact she overstepped herself.

It does not in any way condone continuing to take liberties with someone's person after they say "stop".

I completely agree.